Výsledky vyhledávání - "Geints, Yu. E."

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Energy deposition in air by moderately focused femtosecond laser filaments

Autor: Geints, Yu. E., Geints, I. Yu., Grudzin, Ya. V., Koribut, A. V., Pushkarev, D. V., Rizaev, G. E., Seleznev, L. V.

Filamentation of high-power femtosecond laser pulses in air is accompanied by a fairly strong release of optical energy into the propagation medium due to laser-induced ionization of air molecules and production of an underdense plasma of charged spe

Externí odkaz: http://arxiv.org/abs/2403.00242

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Photophoretic Movement of a Micron-Sized Light-Absorbing Capsule: Numerical Simulation

Autor: Geints, Yu. E., Panina, E. K.

Multilayer microparticles with a liquid core and a polycomposite light-absorbing shell (microcapsules) are important components of modern bio- and medical technologies. Opening of the microcapsule shell and payload release can be realized by optical

Externí odkaz: http://arxiv.org/abs/2402.03645

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Talbot photolithography optimization with engineered hybrid metal-dielectric mask: High-contrast and highly-uniform Talbot stripes

Autor: Geints, Yu. E., Minin, I. V., Minin, O. V.

Conventional projection Talbot lithography usually employs opaque (amplitude) or transparent (phase) masks for creating a periodic array of Fresnel diffraction fringes in the photosensitive substrate. For particular mask design the longitudinal perio

Externí odkaz: http://arxiv.org/abs/2109.10904

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Concept of miniature optical pressure sensor based on coupled WGMs in a dielectric microsphere

Autor: Geints, Yu. E., Minin, I. V., Minin, O. V.

We present the physical concept and sample engineering design of a new miniature pressure sensor based on the whispering gallery modes (WGMs) optically excited in a dielectric microsphere placed near a flexible reflective membrane which acts as an am

Externí odkaz: http://arxiv.org/abs/2106.09477

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Energy limit for linear-to-nonlinear femtosecond laser pulse focusing in air

Autor: Geints, Yu. E., Mokrousova, D. V., Pushkarev, D. V., Rizaev, G. E., Seleznev, L. V., Geints, I. Yu., Ionin, A. A., Zemlyanov, A. A.

Propagation of a tightly focused high-power ultrashort laser pulse in an optical medium is usually substantially influenced by the medium optical nonlinearity that can noticeably affect the laser pulse parameters around the nonlinear focus and lead t

Externí odkaz: http://arxiv.org/abs/2104.01741

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Dynamics of femtosecond synthesized coronary profile laser beams filamentation in air

Autor: Geints, Yu. E., Zemlyanov, A. A.

Multiple filamentation in air of high-power ultrashort laser radiation with transverse intensity profile resembling a "corona" composed by incoherent combining of several annularly distributed independent top-hat sub-beams is theoretically studied. T

Externí odkaz: http://arxiv.org/abs/2012.09361

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Specular-reflection photonic hook generation under oblique illumination of a super-contrast dielectric microparticle

Autor: Geints, Yu. E., Zemlyanov, A. A., Minin, I. V., Minin, O. V.

The possibility of overcoming the critical condition for localized photonic nanojet upon plane optical wave diffraction at mesoscale dielectric particle, which is commonly known as "the refractive index contrast is less than two", was recently report

Externí odkaz: http://arxiv.org/abs/2009.14012

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